Login
Login
Sign up
Start
Mathmania
Teacher tutorials
TOP
Subjects
Bridge Course
Testworks
Subject updates
Ya+
News
Send feedback
See more
Contacts
About Us
Terms and Conditions
Privacy Policy
PDF chapter test
TRY NOW
Subjects
Science State Board
Class 10
Periodic Classifications of elements
The modern periodic law
7.
Choose the best: Modern periodic law
Exercise condition:
4
m.
Select the right answers:
1.
Henry Moseley is a __________ scientist.
British
Spanish
Russian
German
2.
__________ is the reason that argon comes before potassium in the periodic table.
Electron affinity
Atomic number
Atomic mass
Atomic ratio
Login
or
Fast registration
Previous exercise
Exit to the topic
Next exercise
Send feedback
Did you find an error?
Send it to us!